Salix OS

I know slackware 14 is at rc1 at the moment, and probably was benchmarked by "Phoronix" in Beta, but, does anyone have an idea why it seemed to perform less well than Arch, Ubuntu and Fedora?
http://www.phoronix.com/scan.php?page=a ... tros&num=1

There's a discussion over at linuxquestions